The discovery of the Blombos cave suggests a. copper alloy or bronze casting were first used in Sub Saharan Africa. b. Islam became an economic and religious force in West and North Africa. c. that abstract thought in humans occurred much earlier than once thought. d. the French colonies were taken over before the third or fourth centuries. Please select the best answer from the choices provided A B C D

Option: c. that abstract thought in humans occurred much earlier than once thought.

Explanation:

The discovery of the Blombos cave in cape Town considered to be one of the important archaeologist discovery in Africa which gives information about the behaviours of our ancestors. The abstract drawing which we found in the cave is dated back to 73,000 years old. The excavations from  Europe, Africa and Southeast Asia is dated back to 40,000 years ago. This notable discovery foreshadows the earliest previously known abstract and figurative drawings.                

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can you explain it better